While browsing through CCSM I clicked Advanced, I guess, and whole GUI crashed, I've seen ONLY a wallpaper with some graphical noise on it. I rebooted and all I see is Desktop with icons on it and menu at the upper bar "File|Edit|View.." etc. without tools to shutdown or logout and that would be all. No dash, none of keyboard shortcuts working, no way for me to open console to try to fix it. Wanted to reset X via console (Ctrl+Alt+F1) but all I see is graphical noise, nothing readable, commands I tried to put without seeing them didn't work either. Please help.
Logging into different GUI helped (Ubuntu -> Ubuntu 2D), although anyone could help how to reset Ubuntu's GUI settings?